2 * Copyright (C) 2008 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef _HARDWARE_GPS_H
18 #define _HARDWARE_GPS_H
26 /** Milliseconds since January 1, 1970 */
27 typedef int64_t GpsUtcTime;
29 /** Maximum number of SVs for gps_sv_status_callback(). */
30 #define GPS_MAX_SVS 32
32 /** Requested mode for GPS operation. */
33 typedef uint16_t GpsPositionMode;
34 // IMPORTANT: Note that the following values must match
35 // constants in GpsLocationProvider.java.
36 /** Mode for running GPS standalone (no assistance). */
37 #define GPS_POSITION_MODE_STANDALONE 0
38 /** AGPS MS-Based mode. */
39 #define GPS_POSITION_MODE_MS_BASED 1
40 /** AGPS MS-Assisted mode. */
41 #define GPS_POSITION_MODE_MS_ASSISTED 2
43 /** GPS status event values. */
44 typedef uint16_t GpsStatusValue;
45 // IMPORTANT: Note that the following values must match
46 // constants in GpsLocationProvider.java.
47 /** GPS status unknown. */
48 #define GPS_STATUS_NONE 0
49 /** GPS has begun navigating. */
50 #define GPS_STATUS_SESSION_BEGIN 1
51 /** GPS has stopped navigating. */
52 #define GPS_STATUS_SESSION_END 2
53 /** GPS has powered on but is not navigating. */
54 #define GPS_STATUS_ENGINE_ON 3
55 /** GPS is powered off. */
56 #define GPS_STATUS_ENGINE_OFF 4
58 /** Flags to indicate which values are valid in a GpsLocation. */
59 typedef uint16_t GpsLocationFlags;
60 // IMPORTANT: Note that the following values must match
61 // constants in GpsLocationProvider.java.
62 /** GpsLocation has valid latitude and longitude. */
63 #define GPS_LOCATION_HAS_LAT_LONG 0x0001
64 /** GpsLocation has valid altitude. */
65 #define GPS_LOCATION_HAS_ALTITUDE 0x0002
66 /** GpsLocation has valid speed. */
67 #define GPS_LOCATION_HAS_SPEED 0x0004
68 /** GpsLocation has valid bearing. */
69 #define GPS_LOCATION_HAS_BEARING 0x0008
70 /** GpsLocation has valid accuracy. */
71 #define GPS_LOCATION_HAS_ACCURACY 0x0010
73 /** Flags used to specify which aiding data to delete
74 when calling delete_aiding_data(). */
75 typedef uint16_t GpsAidingData;
76 // IMPORTANT: Note that the following values must match
77 // constants in GpsLocationProvider.java.
78 #define GPS_DELETE_EPHEMERIS 0x0001
79 #define GPS_DELETE_ALMANAC 0x0002
80 #define GPS_DELETE_POSITION 0x0004
81 #define GPS_DELETE_TIME 0x0008
82 #define GPS_DELETE_IONO 0x0010
83 #define GPS_DELETE_UTC 0x0020
84 #define GPS_DELETE_HEALTH 0x0040
85 #define GPS_DELETE_SVDIR 0x0080
86 #define GPS_DELETE_SVSTEER 0x0100
87 #define GPS_DELETE_SADATA 0x0200
88 #define GPS_DELETE_RTI 0x0400
89 #define GPS_DELETE_CELLDB_INFO 0x8000
90 #define GPS_DELETE_ALL 0xFFFF
93 typedef uint16_t AGpsType;
94 #define AGPS_TYPE_SUPL 1
95 #define AGPS_TYPE_C2K 2
98 /** AGPS status event values. */
99 typedef uint16_t AGpsStatusValue;
100 /** GPS requests data connection for AGPS. */
101 #define GPS_REQUEST_AGPS_DATA_CONN 1
102 /** GPS releases the AGPS data connection. */
103 #define GPS_RELEASE_AGPS_DATA_CONN 2
104 /** AGPS data connection initiated */
105 #define GPS_AGPS_DATA_CONNECTED 3
106 /** AGPS data connection completed */
107 #define GPS_AGPS_DATA_CONN_DONE 4
108 /** AGPS data connection failed */
109 #define GPS_AGPS_DATA_CONN_FAILED 5
112 * Name for the GPS XTRA interface.
114 #define GPS_XTRA_INTERFACE "gps-xtra"
117 * Name for the AGPS interface.
119 #define AGPS_INTERFACE "agps"
121 /** Represents a location. */
123 /** Contains GpsLocationFlags bits. */
125 /** Represents latitude in degrees. */
127 /** Represents longitude in degrees. */
129 /** Represents altitude in meters above the WGS 84 reference
132 /** Represents speed in meters per second. */
134 /** Represents heading in degrees. */
136 /** Represents expected accuracy in meters. */
138 /** Timestamp for the location fix. */
139 GpsUtcTime timestamp;
142 /** Represents the status. */
144 GpsStatusValue status;
147 /** Represents SV information. */
149 /** Pseudo-random number for the SV. */
151 /** Signal to noise ratio. */
153 /** Elevation of SV in degrees. */
155 /** Azimuth of SV in degrees. */
159 /** Represents SV status. */
161 /** Number of SVs currently visible. */
164 /** Contains an array of SV information. */
165 GpsSvInfo sv_list[GPS_MAX_SVS];
167 /** Represents a bit mask indicating which SVs
168 * have ephemeris data.
170 uint32_t ephemeris_mask;
172 /** Represents a bit mask indicating which SVs
175 uint32_t almanac_mask;
178 * Represents a bit mask indicating which SVs
179 * were used for computing the most recent position fix.
181 uint32_t used_in_fix_mask;
184 /** Callback with location information. */
185 typedef void (* gps_location_callback)(GpsLocation* location);
187 /** Callback with status information. */
188 typedef void (* gps_status_callback)(GpsStatus* status);
190 /** Callback with SV status information. */
191 typedef void (* gps_sv_status_callback)(GpsSvStatus* sv_info);
193 /** Callback for reporting NMEA sentences. */
194 typedef void (* gps_nmea_callback)(GpsUtcTime timestamp, const char* nmea, int length);
196 /** GPS callback structure. */
198 gps_location_callback location_cb;
199 gps_status_callback status_cb;
200 gps_sv_status_callback sv_status_cb;
201 gps_nmea_callback nmea_cb;
205 /** Represents the standard GPS interface. */
208 * Opens the interface and provides the callback routines
209 * to the implemenation of this interface.
211 int (*init)( GpsCallbacks* callbacks );
213 /** Starts navigating. */
214 int (*start)( void );
216 /** Stops navigating. */
219 /** Closes the interface. */
220 void (*cleanup)( void );
222 /** Injects the current time. */
223 int (*inject_time)(GpsUtcTime time, int64_t timeReference,
226 /** Injects current location from another location provider
227 * (typically cell ID).
228 * latitude and longitude are measured in degrees
229 * expected accuracy is measured in meters
231 int (*inject_location)(double latitude, double longitude, float accuracy);
234 * Specifies that the next call to start will not use the
235 * information defined in the flags. GPS_DELETE_ALL is passed for
238 void (*delete_aiding_data)(GpsAidingData flags);
241 * fix_frequency represents the time between fixes in seconds.
242 * Set fix_frequency to zero for a single-shot fix.
244 int (*set_position_mode)(GpsPositionMode mode, int fix_frequency);
246 /** Get a pointer to extension information. */
247 const void* (*get_extension)(const char* name);
250 /** Callback to request the client to download XTRA data.
251 The client should download XTRA data and inject it by calling
252 inject_xtra_data(). */
253 typedef void (* gps_xtra_download_request)();
255 /** Callback structure for the XTRA interface. */
257 gps_xtra_download_request download_request_cb;
260 /** Extended interface for XTRA support. */
263 * Opens the XTRA interface and provides the callback routines
264 * to the implemenation of this interface.
266 int (*init)( GpsXtraCallbacks* callbacks );
267 /** Injects XTRA data into the GPS. */
268 int (*inject_xtra_data)( char* data, int length );
271 /** Represents the status of AGPS. */
274 AGpsStatusValue status;
277 /** Callback with AGPS status information. */
278 typedef void (* agps_status_callback)(AGpsStatus* status);
280 /** Callback structure for the AGPS interface. */
282 agps_status_callback status_cb;
286 /** Extended interface for AGPS support. */
289 * Opens the AGPS interface and provides the callback routines
290 * to the implemenation of this interface.
292 void (*init)( AGpsCallbacks* callbacks );
294 * Notifies that a data connection is available and sets
295 * the name of the APN to be used for SUPL.
297 int (*data_conn_open)( const char* apn );
299 * Notifies that the AGPS data connection has been closed.
301 int (*data_conn_closed)();
303 * Notifies that a data connection is not available for AGPS.
305 int (*data_conn_failed)();
307 * Sets the hostname and port for the AGPS server.
309 int (*set_server)( AGpsType type, const char* hostname, int port );
312 /** Returns the hardware GPS interface. */
313 const GpsInterface* gps_get_hardware_interface();
316 * Returns the qemu emulated GPS interface.
318 const GpsInterface* gps_get_qemu_interface();
321 * Returns the default GPS interface.
323 const GpsInterface* gps_get_interface();
329 #endif // _HARDWARE_GPS_H